Threat Level: green Handler on Duty: Pedro Bueno

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Microsoft killed Kelihos botnet

Published: 2011-09-27
Last Updated: 2011-09-27 23:35:31 UTC
by Jason Lam (Version: 1)
1 comment(s)

Great news for Internet security. Microsoft has effectively killed off the Kelihos botnet which has about 42-45K nodes. The signature to remove the botnet agent from infected machine is added to the Malicious Software Removal Tool which will be rolled out to users taking automatic updates. Microsoft also took a proactive approach on the legal front, filing for court order to get Verisign (the domain registrar for the malicious domains) to take down the malicious domains related to the botnet operations.

Great to see the Digital Crimes Unit at Microsoft being so proactive about shutting down malware. 

More info on this,

http://blogs.technet.com/b/mmpc/archive/2011/09/26/operation-b79-kelihos-and-additional-msrt-september-release.aspx
http://www.computerworld.com/s/article/9220321/Striking_a_domain_provider_Microsoft_kills_off_a_botnet?taxonomyId=82&pageNumber=1

Keywords:
1 comment(s)

New feature in JUNOS to drop or ignore path attributes.

Published: 2011-09-27
Last Updated: 2011-09-27 22:06:10 UTC
by donald smith (Version: 1)
1 comment(s)

Some readers have been writing in saying they are seeing parts of their network drop peering for “unknown reasons”. The reason is that Saudi Telecom was sending out routes with invalid attribute #128 (a private attribute).

NANOG posting showing private attribute discussion.
http://www.gossamer-threads.com/lists/nanog/users/144466
This was triggering a Juniper peering issue the PSN information below requires a juniper login.
http://www.juniper.net/alerts/viewalert.jsp?txtAlertNumber=PSN-2011-09-380&actionBtn=Search
Juniper is (was) following RFC 4274 http://www.ietf.org/rfc/rfc4271
“When any of the conditions described here are detected, a
   NOTIFICATION message, with the indicated Error Code, Error Subcode,
   and Data fields, is sent, and the BGP connection is closed (unless it
   is explicitly stated that no NOTIFICATION message is to be sent and
   the BGP connection is not to be closed).  If no Error Subcode is
   specified, then a zero MUST be used.”

Starting with Junos 10.2, Juniper added the ability to allow you to
completely ignore or drop the path attributes of your choice:

http://www.juniper.net/techpubs/en_US/junos10.4/topics/task/configuration/bgp-drop-path-attributes-configuring.html
http://www.juniper.net/techpubs/en_US/junos10.4/topics/task/configuration/bgp-ignore-path-attributes-configuring.html

There is some fairly new work being done in an IETF routing working group to allow for minor miscommunication between peers without dropping the session and all of your neighbors routes. It is still early but given the issues we have seen with things like this lately it is a good step forward as is Juniper's new abilities.

Keywords: bgp junos outages
1 comment(s)
Firefox 3.6.23 security update is out and so is version 7 (time to break some add-on)
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